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Updated: May 26, 2026

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
Published on: October 11, 2016
Coherence effects in Mie scattering
David G Fischer1, Thomas van Dijk, Taco D Visser
1Research and Technology Directorate, NASA Glenn Research Center, Cleveland, Ohio 44135, USA. dgfischer@nasa.gov
Abstract:
The scattering of a partially coherent beam by a deterministic, spherical scatterer is studied. In particular, the Mie scattering by a Gaussian Schell-model beam is analyzed. Expressions are derived for (a) the extinguished power, (b) the radiant intensity of the scattered field, and (c) the encircled energy in the far field. It is found that the radiant intensity and the encircled energy in the far field depend on the degree of coherence of the incident beam, whereas the extinguished power does not.
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